Q: Is 18,420 a Prime Number?
A: No, 18,420 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 18420 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 307 614 921 1,228 1,535 1,842 3,070 3,684 4,605 6,140 9,210 and 18,420, with no remainder.
Since 18,420 cannot be divided by just 1 and 18,420, it is not a prime number.